Antenna



FIG. 1 is a perspective view of an antenna showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is rear elevational view thereof;

FIG. 4 is a right side perspective view thereof;

FIG. 5 is a left side perspective view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 a bottom plan view thereof.

The broken lines in FIG. 5 depict portions of the antenna that form nopart of the claimed design.

CLAIM The ornamental design for an antenna, as shown and described.